<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 提示区域 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 步骤条区域 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <!-- tab栏 -->
        <el-tabs
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="catelist"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的Item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="cb"
                  border
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action图片上传的后台api地址 -->
            <!-- on-preview指定预览事件 -->
            <!-- on-remove点击移除图片 -->
            <!-- list-type可以指定预览的形式 -->
            <el-upload
              :action="uploadURL"
              :headers="headerObj"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :on-success="handleSuccess"
              list-type="picture"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <quill-editor v-model="addForm.goods_introduce">
              
            </quill-editor>
            <!-- 添加商品按钮 -->
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewVisible"
      width="50%"
    >
     <img :src="previewPath" alt="" class="previewImage">
    </el-dialog>
  </div>
</template>

<script>
// lodash提供深拷贝
import _ from 'lodash'

export default {
  data() {
    return {
      activeIndex: '0',
      // 添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        // 图片的数组
        pics: [],
        // 商品的详情描述
        goods_introduce:''
      },
      // 商品分类列表
      catelist: [],
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' },
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' },
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' },
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' },
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' },
        ],
      },
      cateProps: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
      },
      // 动态参数列表数据
      manyTableData: [],
      // 静态参数列表数据
      onlyTableData: [],
      // 上传图片的api地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      headerObj: {
        Authorization: window.sessionStorage.getItem('token'),
      },
      previewPath:'',
      previewVisible:false,
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.message.error('获取商品分类数据失败')
      }
      this.catelist = res.data
      console.log(this.catelist)
    },
    // 级联选择器选中项变化，会触发这个函数
    handleChange() {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选择三级分类')
        this.addForm.goods_cat = []
        return
      }
    },
    beforeTabLeave(activeName, oldActiveName) {
      if (this.addForm.goods_cat.length !== 3 && oldActiveName === '0') {
        this.$message.error('请选择商品分类')
        return false
      }
    },
    async tabClicked() {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: 'many',
            },
          }
        )

        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败')
        }
        this.manyTableData = res.data
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        console.log(this.manyTableData)
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: 'only',
            },
          }
        )

        if (res.meta.status !== 200) {
          return this.$message.error('获取静态参数列表失败')
        }

        this.onlyTableData = res.data
        console.log(this.onlyTableData)
      }
    },
    // 处理图片预览效果
    handlePreview(file) {
      console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 处理移除事件
    handleRemove(file) {
      // 1、获取将要删除的图片临时路径
      const filePath = file.response.data.tmp_path
      // 2、从pics数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex((x) => x.pics === filePath)
      console.log('i' + i)
      // 3、调用数组的splice方法，吧图片信息对象，从pics移除
      this.addForm.pics.splice(i, 1)
      console.log(+this.addForm)
    },
    // 监听图片上传成功的事件
    handleSuccess(response) {
      // 1、拼接得到一个图片信息对象
      const picInfo = {
        pic: response.data.tmp_path,
      }
      // 2、将图片信息对接，push到pics数组中
      this.addForm.pics.push(picInfo)
      console.log(this.addForm)
    },
    async add(){      
      this.$refs.addFormRef.validate(async (valid)=>{
        if(valid) return
      })
      // 执行添加的业务逻辑
      // 深拷贝了一份form
      const form = _.cloneDeep(this.addForm)
      form.goods_cat = form.goods_cat.join(',')
      this.manyTableData.forEach(item=>{
        const newInfo = {
          attr_id:item.attr_id,
          attr_value:item.attr_vals.join(' '),
        }
        this.addForm.attrs.push(newInfo)
      })
      this.onlyTableData.forEach(item=>{
        const newInfo = {
          attr_id:item.attr_id,
          attr_value:item.attr_vals.join(' '),
        }
        this.addForm.attrs.push(newInfo)
      })
      form.attrs = this.addForm.attrs
      console.log(form);

      // 发起请求添加商品
      // 商品的名称，必须是唯一的
      const { data: res } = 
      await this.$http.post('goods',form)

      if(res.meta.status !== 201){
        return this.$message.error('添加商品失败')
      }
      
      this.$message.success('添加商品成功')
      this.$router.push('/goods')
    }
  },

  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    },
  },
}
</script>
<style lang='less' scoped>
.el-checkbox {
  margin: 0 10px 0 0;
}
.previewImage{
  width: 100%;
}
.btnAdd{
margin-top: 15px;
}

</style>